DC welding machine 400 is protected under welding

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Your question is not very detailed, so I will give you a rough explanation:

I assume that the protection you are talking about means that the welding machine is thermal protection, and the overheating protection light on the welding machine panel is on, and the general welding machine will not be thermal protection now. Generally, the machine is out of order. Thermal protection lamps are also faulty lamps.

You are powered on this protective light on. Or is it that the protective light will be on after a while? After a while, the protective light will not be on.

The machine has to be welded again. This should be made clear.

Generally speaking, the thermal protection of the welding machine may indicate that the power of the welding machine is small (some welding machine factories cut corners, marking the actual current and voltage, etc., are exaggerated and falsely reported), and the load rate is low. And you have a large welding current and a long time. The method of treating the symptoms can reduce the welding current and intermittent for a period of time.

The current air temperature is not thermally protected without exceeding the load. Of course, the best way is to buy a high-power welding machine.

And now you can try it out like this:

1. Check whether the electric fan is rotating, and whether there is wind when rotating;

2. Whether there is dust in the fan blades and the internal circuit board, it may be that there is too much ash inside, take a brush and blow it with an air compressor.

Kiss is happy to answer for you: DC 200 welding machine will protect as soon as it is firedAnswer: Kiss is the switch tube (3878) and the broken (may be soft breakdown) has not been replaced; The drive circuit resistor or diode is not found to be burned, resulting in abnormal driving; The threshold of the overcurrent sampling circuit is set too low or the resistance is changed, which leads to the over-current protection circuit that is over-plexed and sensitive. The fast recovery diode of the secondary rectifier circuit may be partially damaged; The control board is faulty.

What happens to the overheating protection when the DC welder is ignited? If you turn on the thermal protection, either there is a problem with the control circuit, or there is a problem with the thermostat, there are many kinds of protection, such as overvoltage, undervoltage protection, generally power grid voltage abnormal overcurrent protection, etc., there may be device damage, etc.

The protection light of KJH-400 inverter DC welding machine is always on, and the welding machine cannot be welded.

Hello dear and happy to answer your <>

The protection light of the KJH-400 inverter DC welding machine is always on, and the welding machine can not start welding1 The continuous welding time is long The current is too large, which exceeds the rated load rate of the welding machine. Reduce the welding current parameters and increase the rest time of the welding machine. 2. If the dust is not removed according to the dust removal requirements of the welding machine, the welding machine needs to be dusted with compressed Jingzheng air at least twice a month.

In harsh environments such as large dust, the number of dust blowing should be increased. Otherwise, the dust falls on the road plate components and affects the normal heat dissipation, causing the thermal protection of the welding machine. Many welding machine thermal protection, overvoltage, overcurrent brightness and regret are the same indicator light.

3. The welding machine is normal, the indicator light and the control system are falsely alarmed, and the protection light caused by it cannot be welded. For this reason, you can only go to the after-sales service of the welding machine or other welding machine maintenance points to repair and troubleshoot. Replace parts if necessary to solve the problem.

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The no-load voltage of the DC welding machine is 60V, and it is guaranteed immediately after welding, what is the reason?

Hello, the no-load voltage of the pro-DC welding machine is 60V, and the reason for the warranty immediately after welding: reason: the first demolition of the old one:

The welding machine has a long continuous time and the current is too large, which exceeds the rated load rate of the welding machine, causing the welding machine to turn on the protective light. This requires reducing the welding current parameters and increasing the rest time of the welding machine. The second:

If the welding work ring touches the royal section or during the operation, the dust is not removed in accordance with the dust removal requirements of the welding machine, and the dust falls on the road plate components to affect the normal heat dissipation, causing the thermal protection of the welding machine. Many welders have the same indicator light for thermal protection, overvoltage, overcurrent, etc. This requires us to carry out dust removal operations.

The third type: the welding machine is normal, the indicator light and the control system are falsely alarmed, and the protective light caused by it cannot be welded. For this reason, you can only go to the welding machine after-sales service or other welding machine repair shops to repair and troubleshoot.

Replace parts if necessary to solve the problem.

The no-load voltage of the DC welding machine is 60V, and it is guaranteed immediately after welding, what is the reason?

Hello, happy to serve you. 1. If the field pipe is damaged, it is overcurrent protection; 2. The middle plate transformer is damaged, which is overcurrent protection; 3. The control board protection circuit is damaged, which is error protection. DC welding machine is a high-power rectifier of rent, divided into positive and negative poles, when the AC power is input, after the transformer transforms, and then rectified by the rectifier, and then outputs the power supply with the ability to descend the external special hail, the output terminal will produce a huge voltage change when it is turned on and off, and the two poles ignite the arc when the instantaneous short circuit is ignited, and the arc generated is used to melt the welding rod and welding consumables, and the cooling is later achieved to achieve the purpose of combining them, and the welding transformer has its own characteristics. The external characteristic is the characteristic that the voltage drops sharply after the electrode is ignited.

The load duration of this welding machine (nameplate.

The x column on is related.

For example, the rated load holding and lapping rate of a welding machine is 100% when it is 300A, which means that the welding machine can be continuously welded when the welding current does not exceed 300A. When the rated load duration of a welding machine is 300A, it means that when the welding current is 300A, the welding machine can only weld continuously for 6 minutes every 10 minutes with a 4-minute break. For the same welding machine, under the rated working voltage, the greater the current of the shed imitation, the lower the load duration.

For example, if a person runs a fast three-minute chain in 10 minutes, he needs to rest for 7 minutes, and if he walks all the time, he hardly needs to rest in 10 minutes.

Summary. One is that the temperature is too high and enters the protection program (the fan turns, cannot be soldered), and the other is that the electronic components are damaged. Wait a while to see if the fault light is off and try again, if not, it should be caused by damage to the components.

One is that the temperature is too high, and it enters the protection program (the fan turns, and it cannot be welded), and the other is that the electronic components are damaged. After a while, I will see if the fault lamp is off and then try, if not, it should be a good resistance caused by component damage.

See if the wires are too small, or if the ambient temperature is too high.

The current of one welding has always been only stable, and the current of one welding is high.

That's right, the current is too high, the load is too big, the wires are too small.